PMID- 9634500 OWN - NLM STAT- MEDLINE DCOM- 19980813 LR - 20200824 IS - 0002-9297 (Print) IS - 1537-6605 (Electronic) IS - 0002-9297 (Linking) VI - 63 IP - 1 DP - 1998 Jul TI - Linkage analysis of human leukocyte antigen (HLA) markers in familial psoriasis: strong disequilibrium effects provide evidence for a major determinant in the HLA-B/-C region. PG - 191-9 AB - Although psoriasis is strongly associated with certain human leukocyte antigens (HLAs), evidence for linkage to HLA markers has been limited. The objectives of this study were (1) to provide more definitive evidence for linkage of psoriasis to HLA markers in multiplex families; (2) to compare the major HLA risk alleles in these families with those determined by previous case-control studies; and (3) to localize the gene more precisely. By applying the transmission/disequilibrium test (TDT) and parametric linkage analysis, we found evidence for linkage of psoriasis to HLA-C, -B, -DR, and -DQ, with HLA-B and -C yielding the most-significant results. Linkage was detectable by parametric methods only when marker-trait disequilibrium was considered. Case-control association tests and the TDT identified alleles belonging to the EH57.1 ancestral haplotype as the major risk alleles in our sample. Among individuals carrying recombinant ancestral haplotypes involving EH57. 1, the class I markers were retained selectively among affecteds four times more often than among unaffecteds; among the few affected individuals carrying only the class II alleles from the ancestral haplotype, all but one also carried Cw6. These data show that familial and "sporadic" psoriasis share the same risk alleles. They also illustrate that substantial parametric linkage information can be extracted by accounting for linkage disequilibrium. Finally, they strongly suggest that a major susceptibility gene resides near HLA-C. FAU - Jenisch, S AU - Jenisch S AD - Department of Immunology, University of Kiel, Kiel, Germany. FAU - Henseler, T AU - Henseler T FAU - Nair, R P AU - Nair RP FAU - Guo, S W AU - Guo SW FAU - Westphal, E AU - Westphal E FAU - Stuart, P AU - Stuart P FAU - Kronke, M AU - Kronke M FAU - Voorhees, J J AU - Voorhees JJ FAU - Christophers, E AU - Christophers E FAU - Elder, J T AU - Elder JT LA - eng GR - GM52205/GM/NIGMS NIH HHS/United States GR - P30 HG00209-03/HG/NHGRI NIH HHS/United States GR - R01 AR4274-01/AR/NIAMS NIH HHS/United States PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, Non-P.H.S. PT - Research Support, U.S. Gov't, P.H.S. PL - United States TA - Am J Hum Genet JT - American journal of human genetics JID - 0370475 RN - 0 (Genetic Markers) RN - 0 (HLA Antigens) RN - 0 (HLA-B Antigens) RN - 0 (HLA-C Antigens) SB - IM CIN - Am J Hum Genet. 1999 Mar;64(3):895-6. PMID: 10053024 MH - Adult MH - Age of Onset MH - Female MH - Genetic Linkage/*genetics MH - Genetic Markers MH - Germany MH - HLA Antigens/*genetics MH - HLA-B Antigens/genetics MH - HLA-C Antigens/genetics MH - Haplotypes/genetics MH - Humans MH - Lod Score MH - Male MH - Michigan MH - Pedigree MH - Phenotype MH - Psoriasis/*genetics PMC - PMC1377223 EDAT- 1998/06/23 02:01 MHDA- 2000/03/21 09:00 PMCR- 1999/01/01 CRDT- 1998/06/23 02:01 PHST- 1998/06/23 02:01 [pubmed] PHST- 2000/03/21 09:00 [medline] PHST- 1998/06/23 02:01 [entrez] PHST- 1999/01/01 00:00 [pmc-release] AID - S0002-9297(07)60739-3 [pii] AID - 10.1086/301899 [doi] PST - ppublish SO - Am J Hum Genet. 1998 Jul;63(1):191-9. doi: 10.1086/301899.